Consumers occupy the next links of the chain.
These organisms are able to produce a lot of food by using sunlight as fuel. The chain begins with producers, such as plants and photosynthetic bacteria. A food chain is a simpler way to describe the steps energy takes as it flows through an ecosystem. Several food chains, in turn, compose a single food web for a community. The food chain illustrates how energy is transferred from one organism to another as a repeating cycle.